Transportable clamping apparatus for welding purposes.



H. GOLDSGHMIDT & P.-LANGE. TRANSPORTABLE OLAMPING APPARATUS FOR WELDING PURPOSES.

APPLIOATION FILED SBPTJB, 19M.-

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H. GOLDSCHMIDT & F. LANGE. TRANSPORTABLE GLAMPING APPARATUS FOR WELDING PURPOSES.

APPLICATION FILED SEPT. 16, 1907.

Patented July 19, 1910.

2 SHEETS-SHEET 2.

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HANS GOLDSCHMIDT AND FELIX LANG-E, 0F ESfiiEN-ON-THE-RUHR, GERMANY, AS-

SIGNORS '10 GOLDSGHMIDT THERMIT COMPANY 0E NEW YORK.

TRANSPORTABLE CLAMPING- ArrARArUsroR WELDING PURPOSES.

ecacao.

Specification of Letters Patent.

Patented July 19, 1910.

Application filed September 18, 1907. Serial No. 393,563.

is an exact specification.

This invention relates to the clamps used for welding rail and like lengths electrically or by the thermic pnocessl Such welding is tained. It will frequently caried out in situ and the present invention relates particularly to a clamp for use in welding by any of these processes in situ. In order to get eificient action in such clamps we have discovered that it'is .of the bar. By this means a very accurate alinement of the arts to be welded is obabove that the ordinary tong-grip will not be suflicient and therefore we employ in our suitably supported from true adapted to run on the rails or the like and means is rovided for lowering or raising the clamping jaws.

' he. invention will be more readily understood from the accompan ing drawings and the novel combination of parts is set forth in the claims.

The improved clamp is illustrated in the:

' accompanying drawin in which-.-

' .ment therefor, Fig. 4 is a detail plan view Figure 1 is an elevatlon of the clamping de-.

vice with one of the-right hand jaws shown in section, Fig. 2 is a plan of the clamping device shown in Fig. 1, Fig. 3 illustrates the clamping device and transporting arrange- Clamping Apparatus for Welding Purposes, of which the following e recognized from .the

tubes D and D.

of the-transporting device, Fig. illustrates a modified form of the gripping plate in vertical cross section and Fig. 6 is a section on the line wm of Fig. 5.

In carrying the 1nvention into effect according to the form shown the rail or like lengths R, which areto be butt'welded, are

.gripped'between jaws A, A, A, A The aws A, A arranged on one side of the rail lengths R are pivoted on a tube D which passes through bosses A and A connected by webs A and A with the said jaws A and A. The jaws A and A on the opposite side of the rail lengths are pivoted about a tube D which fits in bosses A and A connected to the said jaws A and A by means of webs A A. The diagonally opposite bosses A and A are held from sliding on the tubes D, D by means of collars E and E and nuts, G and G engaging screws F and F threaded into the ends of the tubes D and D. The other set of diagonally opposite jaws A and A are adapted to slide with their bosses A and A over the, tubes D and D. This sliding motion is obtained by means of nuts J and J en; gaging screws H and H of considerable length which project from the ends of the The nuts J and J are hollowed out to form annular chambers .J

and J into which the tubes D and D are drawn. The nuts J and J are also provided with shoulders J and'J which are held by collars K and K fixed in any suitable way to the bosses A and A. By means of the mechanism described the pairs of jaws A,

A and A, A after 'they-have'be'en caused togrip the rail R in the manner hereinafter described may be. drawn toward one another in the" axial direction of the rail.

gripping lates B,-B, B B are shaped so' as to con orm substantially to the profile of the rail and thereby insure a good gripping action. 'Over the jaws and on the outsides of the. same there are arranged cramping yokes L and L. The cramping yokes butt onone side with the jaw M against one of the jaws. of a pair and on the other side of the rail the cramping yokes L and L carry threaded rods M and M, the inner end of which bears against the opposite jaw of a pair to that which is engaged by the jaw M 5 It will be seen that with this device it is possible on rotating the screwed rods M and M to cause the pairs of jaws to grip the rail B after which the said pairs of jaws may be 7 caused to approach each other as described 10 above.

. 25 0 O on which the said hanger brackets- For facilitating transport and insuring the correct coaxial arrangement of the jaws during welding the cramping yokes L and L are carried by the transporting device hereinafter described and illustrated in Figs. 3 and 4. For this purpose the cramping yokes L and L are provided with lugs L and L Over these lu'gs there pass the forked brackets N and N which are fastened to the lugs by pins U, U, washers V, V and split pins V V The brackets N, N are hook shaped upwardly and surround sleeves O, 0 so that the said brackets N and N act as hanger brackets. The sleeves O, O carry shoulders N, N rest and these sleeves carry further hand wheels Q, Q by which they may be rotated. The sleeves O, O are internally threaded and engage an external thread on vertical rods P, P.' The vertical rods P, P are fixed to forked brackets T, T. These forked brackets carry the axles S, S of the truck wheels W, W. The truck wheels W, W are adapted to run on the rail lengths as R. R. a

For the purpose of efi'ecting slight adjustments of the'rails relatively to one another we prefer to employ the device shown in Figs. 5 and 6 on at least one of the faces of 40 the jaws of a pair that is either on the aw A or A and on the jaw A or A For the sake of clearness this form of adjustable gripping plate has been separately illustrated, as applied to the jaw A The gripping plate B is bored out with two diameters so as to accommodate the diametersC and C of a pin 0 The disk C on the pin is arranged eccentrically to the seen in Fig. 6. The part 2 is supp) rted in the jaw A and a suitable collar is em- .ployed to retain the said pin in place.- A squared end C enables rotation of the said pin. It will be seen thatby rotating the pin C the gripping plate B may be .raised or v lowered and thereby one length of the rail may be raised. or lowered as required to bring it intoalinement' with the opposite rail.

The device hereinbefore described when in '60 use is employed for butt-welding two lengths. One of the lengths is gripped between the jaws A, A by tightening up the threadedrod M and the other length is gripped between the jaws A, A by tighten- 'tained by the device illustrated.

said jaws to the rail lengths, means for rt C as can be ing up the threaded rod M. Thejoint is then of course between the two pairs of jaws.

'When the ends ofthe lengths have been brought to a welding heat for instance, by the well known alumino-thermic process the nuts J and J are rotated and thereby the pairs of jaws are caused to approach each other and place the ends of the rail together.

' During this motion the said len ths are efliciently guided by the said rods and D so that'the two lengths are correctly and accu- 7 5 rately welded in line. After welding is complete the jaws A, A A, A require only to be slackened back and the entire device trolleyed along the rail to the next joint so that rapidity, accuracy and convenience are ob- We claim 1. In a clamping apparatus for butt-welding rail and like lengths the combination of cylindrical guides adaptedto be placed on 35 opposite sides of the rail lengths and. carrying threaded end pieces, clamping jaws pivoted on said cylindrical guides so that a. jaw on one guide co-acts to'efiect clamping with a jaw on the other guide, a cramping yoke for each pair of jaws to draw said jaws together to grip the rails, collars on the guides against which some of said jaws .are held from axial slidin nuts engaging some of the threaded en pieces on the guides to hold the said jaws against said collars and nuts eng ging the remaining threaded end pieces on the guides to cause the gripping palrs of jaws to approachone another.

2. A transportable clamp for butt weld ing rail and like lengths comprisin sets of clamping jaws, side guiding means or guidmg said jaws axially, means for tightening drawing said sets of jaws toward one another, wheels adapted to run in the line of the lengths to be joined, hangers supported from said wheels and engaging the clamping apparatus and means for raismg and lowering said hangers.

3. In a transportable clamping apparatus for welding purposes, the combination of a jaw body, a rotatable shaft supported in said body, a disk eccentrically fixed on said shaft on its front end, a gripping plate on said jaw body and recessedto receive the eccentric disk on the shaft, a collar on the rear of said shaft and butting a ainst said jaw body .tohold said shaft in p ace and a part on said shaft extendin beyond said collar for thepurpose of enab ing said shaft to be rotated, substantially as described,

4. In combination with a transportable clamping apparatus, a carrier for sai clamplng apparatus comprising a wheel,.a forked support, an axle carried by said support and on which said 'w'heel revolves, an

upright threaded spindle carried by said In Witness whereof we have hereunto set forkeddsuppolt', a tlireaded sleeve eniga g our hands in the presence of two Witnesses. 10 on s'al spin e a anger supporte rom said sleeve and attached to the clam ing ig fi apparatus and means for rotating said s eeve on the screwed spindle for the purpose of Witnesses:

raising and lowering said clamping appa- ALFRED POHLMEYER, ratus, substantially as described. M. ENGELS 

